Sabanov, Sergei, Jyri Rivaldo Pastarus, and Julia Shommet. “Sustainability Assessment Methods In Oil Shale Mine Closure”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 5, 2015): 271–275. Accessed December 4, 2024. https://journals.rta.lv/index.php/ETR/article/view/918.